Applicability of steel slag as replacement aggregate on characteristic of self-compacting concrete

Abstract

This paper aims to apply steel slag as replacement aggregate on the characteristics of Self-Compacting Concrete (SCC). The experimental study was conducted by mixing fresh SCC using partial substitution of coarse aggregate and fine aggregate slag, which were gained from a steel mill by PT Barawaja in Makassar. Two types of cement binder, such as Portland Composite Cement (PCC) and Silica Fume (SF), were used in the SCC mixture. The mix composition of SCC was designed according to The European Guidelines for Self-Compacting Concrete (EFNARC). The criteria requirements of SCC were evaluated by filling ability, viscosity, and passing ability of fresh concrete with testing by Slump-flow, V-funnel, and L-box apparatus. Specimens of concrete cylinders and concrete prisms were also prepared. After curing in water at 28 days, specimens were tested in compressive strength, flexural strength, and tensile strength according to Indonesian Standard (SNI). The results showed that replacement aggregate of steel slag could be applied in SCC concrete production based on SCC requirements. In addition, test results in compressive strength and flexural strength were obtained 60.70 MPa and 8.61 MPa, respectively.